the government says it will help the economy by increasing tourism. >> the first major international marathon since the double bomb attack in boston was held today in london. the boston bomb victims were remembered as a huge crowd cheered on all of the runners. >>> across the pond, runners kept their stride. >> we're going to reclaim our lives. we're not going to let a couple guys take it away from us. >> reporter: the bombings at boston mar heavily influenced the london marathon for runners and organizers. they observed a moment of silence, remembering fellow runners brought down during what should have been a day of personal accomplishment. >> how can you not run for the people of boston and think about that. so motivational and inspirational. >> reporter: huge crowds lined the 26.2 mile race, while organizers brought in hundreds of additional officers to provide security. it's been fine. >> reporter: for every runner to cross the finish line, organizers are donating two british pounds to onefundboston. it is expected to come to $100,000. prince harry greeted runners, adding to the